Yamaha MS45DR Electronic Drums Monitoring SystemThe Yamaha MS45DR 2. 1 channel electronic drum monitor system gives you dynamic and authentic sound. This simple and compact 2. 1 channel electronic drum monitor system is specially designed to authentically reproduce dynamic drum sounds. The MS45DR allows you to enjoy superb sound quality without the isolation of headphones, providing open acoustic drum feeling that you can share with family and friends. Features 2. 1 channel stereo monitor system